Differential D7026 Diff 25484 winery-test-environment/mitogen-strategy/mitogen_host_pinned.py

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winery-test-environment/mitogen-strategy/mitogen_host_pinned.py

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				# Copyright 2019, David Wilson
				#
				# Redistribution and use in source and binary forms, with or without
				# modification, are permitted provided that the following conditions are met:
				#
				# 1. Redistributions of source code must retain the above copyright notice,
				# this list of conditions and the following disclaimer.
				#
				# 2. Redistributions in binary form must reproduce the above copyright notice,
				# this list of conditions and the following disclaimer in the documentation
				# and/or other materials provided with the distribution.
				#
				# 3. Neither the name of the copyright holder nor the names of its contributors
				# may be used to endorse or promote products derived from this software without
				# specific prior written permission.
				#
				# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
				# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
				# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
				# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
				# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
				# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
				# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
				# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
				# POSSIBILITY OF SUCH DAMAGE.

				from __future__ import absolute_import
				import os.path
				import sys

				#
				# This is not the real Strategy implementation module, it simply exists as a
				# proxy to the real module, which is loaded using Python's regular import
				# mechanism, to prevent Ansible's PluginLoader from making up a fake name that
				# results in ansible_mitogen plugin modules being loaded twice: once by
				# PluginLoader with a name like "ansible.plugins.strategy.mitogen", which is
				# stuffed into sys.modules even though attempting to import it will trigger an
				# ImportError, and once under its canonical name, "ansible_mitogen.strategy".
				#
				# Therefore we have a proxy module that imports it under the real name, and
				# sets up the duff PluginLoader-imported module to just contain objects from
				# the real module, so duplicate types don't exist in memory, and things like
				# debuggers and isinstance() work predictably.
				#

				BASE_DIR = os.path.abspath(
				os.path.join(os.path.dirname(__file__), '../../..')
				)

				if BASE_DIR not in sys.path:
				sys.path.insert(0, BASE_DIR)

				import ansible_mitogen.loaders
				import ansible_mitogen.strategy


				Base = ansible_mitogen.loaders.strategy_loader.get('host_pinned', class_only=True)

				if Base is None:
				raise ImportError(
				'The host_pinned strategy is only available in Ansible 2.7 or newer.'
				)

				class StrategyModule(ansible_mitogen.strategy.StrategyMixin, Base):
				pass